It is proposed to place a cable on an existing pole line along the shore of a

lake to connect two points on opposite sides. The following information

was obtained. Which option is more economical?

A$.$

$L=P866,041$

$S=P783,454$

$S$ is cheaper

B$.$

$L=P98,092\mathrm{.}78$

$S=P92,672\mathrm{.}64$

$S$ is cheaper

Use $($A$)$ PW$,($B$)$ AC methods.